VE FKM

Composition and construction of the E10

Applications and why the Viton E10 is a good fit

You choose the V-ring E10 mainly when you are dealing with heavy contamination or wet conditions and want extra protection for bearings and shaft seals. Think of (heavy) drives, conveyors, industrial fans, gear reducers, pump sets, agricultural or earthmoving machines, and anything exposed to outdoor air, dust or splash water. The E10 is suitable because it places few demands on shaft and housing machining, is relatively insensitive to eccentricity/coaxiality, and because, due to its operating principle, it increasingly functions as a slinger disc/gap seal at higher circumferential speeds, meaning friction and wear actually decrease at higher speed. The Viton compound becomes especially relevant when these harsh conditions come together with higher operating temperatures, oil/fuel exposure or chemical influence, situations where standard compounds can age faster or lose stability.

Material focus: Viton (FKM/FPM)

This page focuses specifically on the Viton option (often specified as FKM or FPM). You typically choose it for higher temperatures, more aggressive media, and for improved ageing stability, especially in outdoor installations where ozone and weathering can accelerate degradation of standard compounds. In many applications, FKM offers broad resistance to oils, fuels and many chemicals, while also maintaining its properties better under heat. The trade-off is that FPM can be less flexible in cold environments (compound-dependent) and is usually selected when you actually need the extra resistance rather than as a default in standard oil/grease conditions.

Materials overview - E10 (Viton focus)

How do you choose the right Viton V-ring E10?

You determine the correct size primarily based on the nominal shaft diameter, because the V-ring clamps onto the shaft through stretch and inherent tension. Make sure the shaft size and fit are logical within the ISO system of fits (think ISO 286) and avoid a shaft that ends up too small, because the ring may then have less grip. Next, look at the counterface, because the E10 seals axially against a surface that can be formed, for example, by the housing, a cover or a pressed-in plate. That surface must be clean, flat and stiff enough; for surface finish it is advisable to keep roughness and finish level in line with common guideline values (ISO 4287/4288 as reference), because a rough or damaged surface leads to wear and leakage more quickly.

Also consider circumferential speed: at standstill the lip presses against the surface with an initial contact pressure, but as speed increases that pressure drops due to centrifugal force, and around 15–20 m/s the lip can (partly) lift, after which the ring works more as a gap seal and slinger disc. Finally, choose the compound based on medium and temperature; Viton (FKM/FPM) is especially suited to higher temperatures, chemistry or outdoor conditions. Keep in mind that the V-ring E10 is primarily a protective and contamination seal and not a pressure seal; with pressure or true liquid sealing you usually combine it with a radial shaft seal.

Comparable models: E10 (VE) vs A10 (VA), S10 (VS) and L10 (VL)

All V-rings work according to the same principle, but the difference lies in profile shape and application area. The E10 (VE) V-ring is the heavy-duty version with a more robust profile and a longer lip, making it a better fit for harsher conditions, larger diameters and installations with greater tolerances. The A10 (VA) V-ring is the standard design you see most often, because it is broadly applicable and usually the right choice when conditions are not extreme. The S10 (VS) V-ring uses a similar lip to the A10, but has a conically extended retaining section so it sits more firmly on the shaft, which is advantageous with vibration or varying loads. The L10 (VL) V-ring is designed for compact installation and has a smaller profile geometry; it is ideal when space is the limiting factor, but it is generally less forgiving than an E10 in heavy or heavily contaminated situations. In practice, you choose E10 for maximum robustness, A10 for standard applications, S10 when extra grip is important and L10 when you mainly have limited installation space.

In summary, the V-Ring E10 is an extended sealing lip rotary seal specifically designed for heavy-duty applications. Its purpose is to provide effective shaft sealing, keeping out contaminants and preventing leakage. With its extended sealing lip, the V-Ring E10 offers enhanced sealing performance and durability in demanding operating conditions. Trust in the V-Ring E10 for reliable and efficient sealing solutions in heavy-duty applications.

If you would like more information, or if you do not know which Ring you should have, feel free to contact us. 

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